Which is an example of a negative homeostatic mechanism?

Shivering when body temperature falls below normal

Define a positive feedback loop

The response that will enhance the original stimulus

Homeostasis exists if concentrations of water, nutrients, and oxygen in the body are balanced and heat and pressure ____

remain within certain limited ranges

Which of the following is a positive feedback loop?

Contraction of the uterus during childbirth.

A simple carbohydrate

has a molecular formula of C6H12O6.

The formula CO2 refers to

a molecule that has 1 carbon atom and 2 oxygen atoms

substances that make up living as well as non-living matter

Which of the following is not true of organelles?

They are only in cells of humans.

When placed into water, the ionic compound KCl will

dissociate into K+ and Cl- ions.

All of the answer choices are correct.

Which of the following groups of elements accounts for more than 95% of the human body by weight?

Carbon, hydrogen, oxygen, nitrogen

Chemical reactions occurring in an organism.

Anatomy and physiology are difficult to separate because

physiological functions depend on anatomical structures.

What is responsiveness?

reaction to internal or external change

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A&P I Chapter 1 & 2 Review

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Review for A&P exam 1 for undergraduate students. Topics covered include needs of organisms, characteristics of life, levels of organization, basic biochemistry.

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Questions 37

Answers

1
What type of molecule is NaBrO considered?
a salt
a solvent
a protein
a buffer
2
The atoms of different elements have
different atomic numbers.
the same atomic number but different atomic weights.
the same atomic number and same atomic weight.
different atomic numbers but the same number of electrons.
3
Amino acids are the building blocks of:
RNA
Fats
DNA
Protein
4
Anatomy and physiology are the study of
Calculus and physics
Structure and function
Medicine and law
Life and times
5
A parietal layer of a serous membrane ________.
lines cavities
secretes mucus
covers organs
secretes serous fluid
6
In an ionic bond
atoms share a pair or more of electrons.
like-charged atoms repel.
oppositely charged atoms attract.
one atom loses and another atom gains electrons.
7
What is homeostasis?
State of internal balance (internal environment)
The act of a substance coming in and out of a cell.
Opposite of equilibrium
State of external balance
8
Which is an example of a negative homeostatic mechanism?
Blood clotting
Retention of fluid leading to retention of more fluid
Shivering when body temperature falls below normal
Childbirth
9
Define a positive feedback loop
Cycle that will only give positive results
Nothing. There’s only a negative feedback loop
The response that will diminish the original stimulus
The response that will enhance the original stimulus
10
The removal of wastes produced by metabolic reactions is
excretion
metabolism
assimilation
absorption
11
Homeostasis exists if concentrations of water, nutrients, and oxygen in the body are balanced and heat and pressure ____
remain within certain limited ranges
increase when the body is stressed
decrease steadily
fluctuate greatly between very high and low values
12
Which of the following best describes the reaction 2NaCl ⇨ 2Na + Cl₂
Synthesis reaction
Reversible reaction
Decomposition reaction
Exchange reaction
13
Which of the following is a positive feedback loop?
Oxygen levels in the blood.
Body temperature.
Regulation of blood sugar.
Contraction of the uterus during childbirth.
14
A simple carbohydrate
has only one nucleotide.
is a building block of protein.
has a molecular formula of C6H12O6.
consists of several joined chains.
15
Which of the following diseases would originate in the abdominopelvic cavity?
Pancreatitis
Bronchitis
Myopia (near-sightedness)
Sinusitis
16
The formula CO₂ refers to
2 carbon molecules and 1 oxygen molecule
1 carbon molecule and 2 oxygen molecules
a molecule that has 1 carbon atom and 2 oxygen atoms
a molecule that has 2 carbon atoms and 1 oxygen atom
17
Which of the following diseases would originate in the abdominopelvic cavity?
Asthma
Laryngitis
Myopia (near-sightedness)
Urinary tract infection (UTI)
18
Chemistry deals with
substances that make up non-living matter only.
substances that make up living as well as non-living matter
the location of organs in body cavities.
substances found in organisms only.
19
Which of the following is not true of organelles?
They are found in many types of cells
They are only in cells of humans.
They carry on specific activities.
They are composed of aggregates of large molecules.
20
When H and H meet, they will
form H2 with a covalent bond.
form individual molecules.
form H2 with an ionic bond.
repel and form no product.
21
When placed into water, the ionic compound KCl will
dissociate into K+ and Cl- ions.
bond more strongly to each other.
decompose.
bond covalently with water molecules, forming HCl and KOH.
22
Which of the following substances is an element?
Water
Glucose
Iron
Sodium chloride
23
The maintanance of a stable internal environment is called what?
homeozygous
homogeneous
stimuli
homeostasis
24
On the pH scale
All of the answer choices are correct.
a 10X change in hydrogen ion concentration between each whole number
pH values above 7 are basic (alkaline).
the lower the number on the scale, the more the H+ concentration.
25
If nitrogen (N) were to gain a proton, it would become
N+
Oxygen
Nitrogen-8
N-
26
Which of the following groups of elements accounts for more than 95% of the human body by weight?
Carbon, hydrogen, oxygen, nitrogen
Calcium, hydrogen, oxygen, nitrogen
Carbon, phosphorus, oxygen, nitrogen
Calcium, hydrogen, oxygen, nitrogen
27
Blood cells are produced in the organs of which system?
skeletal
endocrine
respiratory
muscular
28
What is metabolism?
Chemical reactions occurring in an organism.
Taking in nutrients.
Removal of wastes.
Breakdown of substances into simpler forms.
29
A visceral layer of a serous membrane ________.
secretes serous fluid
lines cavities
secretes mucus
covers organs
30
Anatomy and physiology are difficult to separate because
physiological functions in an organism are ongoing.
body parts take up space.
our understanding of physiology is changing more than our understanding of
physiological functions depend on anatomical structures.
31
The atomic weight of an element whose atoms contain 8 protons, 8 electrons, and 8 neutrons is
32
16
8
24
32
Nucleic acids include
steroids and triglycerides.
proteins and DNA.
enzymes and RNA.
RNA and DNA.
33
Which of the following diseases would originate in the thoracic cavity?
Myopia (near-sightedness)
Asthma
Pancreatitis
Ovarian cysts
34
Specialized cell types organized in a way that provides a specific function form
tissues, which build organs.
atoms, which comprise tissues.
organs, which build tissues.
organ systems, which build tissues.
35
Which of the following best describes the reaction 2H₂+ O₂ ⇨ 2H₂O
Synthesis reaction
Exchange reaction
Decomposition reaction
Reversible reaction
36
What is responsiveness?
reaction to internal or external change
new organisms or new cells
use of oxygen, removal of CO2
increase in size without change in shape
37
In a negative feedback loop, the response:
Does not impact the stimulus
Counteracts the stimulus
Promotes the stimulus

A&P I Chapter 1 & 2 Review Flashcards | StudBud