Human Physiology > Practice exam > Flashcards

Practice exam Flashcards

(50 cards)

Study These Flashcards
1
Q

G protein coupled receptor

A

Hydrophilic ECM, Alpha subunits, DAG

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Alpha receptors

A

Constriction/contraction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Beta receptors (beta 3)

A

dilation/relaxation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Effects of ACh

A

Parasympathetic activation, muscular contractions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What does stimulating the skeletal muscle via somatic nervous system do to RMP?

A

Decrease it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Size principle

A

Behavior of motor nits to stimulate varying degrees of innervated myofibers based on desired force profuction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does EMG show?

A

Electrical activity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is elasticity of a muscle?

A

Elasticity is the ability of a stretched myofiber to recoil (spring back) to its resting length

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What does binding of Ach do to NMJ?

A

Depolarizes it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Increased axon length in/decreases action potential propogation

A

Decreases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Steps of crossbridge cycle

A
  1. Calcium release from SR
  2. Calcium returns to SR, tropomyosin goes to low energy conformation
  3. ATP binds myosin to break myosin actin bond
  4. Recovery stroke
  5. Calcium returns to SR and tropomyosin recovers myosin binding site
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What pathway do water soluble hormones use?

A

JAK/STAT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

G protein coupled receptor works with X soluble hormones

A

lipid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Metabotropic pathway works with

A

neurotransmitters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Postabsorptive periods

A

Post digestion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What processes happen postabsorptive?

A

Gluconeogenesis, proteolysis, glycogenesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Does opening of Cl- channels result in depolarization?

A

No, hyperpolarization

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What does influx of sodium do to RMP?

A

Depolarizes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What does opening potassium gated channels during RMP lead to?

A

IPSP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

IPSP

A

Prevents action potential

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

EPSP

Study These Flashcards
A

Encourages action potential

22
Q

What is the triad?

Study These Flashcards
A

Calcium channels, DHPR, RYR

23
Q

What hormones stimulate gluconeogenesis/

Study These Flashcards
A

Glucagon, GH, insulin

24
Q

What does binding of beta receptors in bronchioles do?

25
Up regulation
Increasing sensitivity to a hormone
26
Is TH amino acid or lipid based?
Amino acids are
27
Characteristics of type 1 muscle fibers
Slow twitch, skinny, fatigue resistant, aerobic resp, red. More myoglobin
28
Characteristics of type 2a
less powerful, more resistant to fatigue than type 2b
29
Characteristics of type 2b
more powerful, less resistant to fatigue than type 2a
30
Type 2 characteristics
Fast, large diameter, fatigue easily, white, less mitochondria
31
At rest, myosin exists in a low/high energy comformation
High
32
When does the powerstroke happen?
The myosin head moves toward the M line, pulling the actin along with it. As the actin is pulled, the filaments move approximately 10 nm toward the M line. As the actin is pulled toward the M line, the sarcomere shortens and the muscle contracts.
33
What does hydrolysis of ATP do
Positions myosin head to be able to form cross bridge
34
What makes APs unique compared to graded potentials?
They involve 2 polarity reversals
35
The parasympathetic division is aka the X division
Craniosacral
36
The sympathetic division is aka the X division
thoracolumbar
37
Parasympathetic postganglionic fibers are
Short and unmyelinated
38
sympathetic postganglionic fibers are
long
39
What pathway uses only a single long axon with no ganglia?
Somatic
40
Sequence of energy being used
ATP from muscle fibers, Creatine phosphate and ADP
41
Lipophilic hormones circulate in plasma...
bound to transport proteins
42
Hydrophilic hormones circulate in plasma...
unbound
43
Which plasma protein makes up the majority of plasma proteins and helps maintain osmotic pressure?
Albumins
44
Alpha globulins
bind to and transport bilirubin, various steroids, including some of the same lipid-soluble hormones
45
What happens to globin portion of hemoglobin after being broken down?
Broken into AAs and excreted
46
What enxyme does fibrinolysis use?
Plasmin
47
What does fibrinogen do?
Turns into fibrin, which clots
48
ACH is Excitatory when it attaches to X myofibers, but it is inhibitory when it attaches to X myofibers
skeletal, cardiac
49
Beta globulins
Transport metals
50
Gamma globulins/immunoglobulins/antibodies(
Most abundant. bind to/Neutralize pathogens.
Human Physiology
flashcards
Decks in class (43)
# Cards
Brainscape helps you reach your goals faster, through stronger study habits.
© 2026 Bold Learning Solutions. Terms and Conditions