Practice

Question 0

In a patient with a compromised blood pressure regulation system, systolic blood pressure drops from 120 to 80. in the same patient with a working regulatory system, blood pressure drops from 120 to 110. what is the gain of this regulatory pathway

Answer 0

-3

Question 1

Which of these ions exists in the highest concentration in the extracellular environment?
A. Potassium
B. Calcium
C. Sodium
D. None of the above

Answer 1

C

Question 2

What kind of regulatory pathway increases the force of uterine contraction in response to stretching of the cervix during childbirth?

Answer 2

Positive feedback loop

Question 3

Whihc organelle is involved in intracellular trafficking

Answer 3

ER and Golgi

Question 4

Glycolysis takes place in the _____, and the Kreb’s cycle in the _____.

Answer 4

Cytosol, mitochondrion

Question 5

What is the movement of particles from a region of high concentration to a region of low concentration.

Answer 5

Diffusion

Question 6

The ____ energy is the average of the ___energy for all molecules that comprise of a sample matter

Answer 6

Thermal/kinetic

Question 7

The Na/K pump is an example of which type of transport?

Answer 7

Primary active antitransport

Question 8

Na/Glucose transporter is an example of which type of transport?

Answer 8

Secondary active cotransport

Question 9

Na/H pump is an example of which type of transport

Answer 9

Secondary active antitransport

Question 10

Where could you find a selectivity filter composed of carbonyl oxygens?

Answer 10

Potassium channels

Question 11

Voltage-gated potassium channels differ from voltage-gated sodium channels in what way?

Answer 11

Potassium channels have one gate

Question 12

Which type of axon will propagate an action potential the fastest?

Answer 12

Large diameter, myelinated

Question 13

An action potential propagating toward the distal end of the axon is propagating in the ____ direction

Answer 13

Orthodromic

Question 14

Calculate the elctromotive force of chloride ion across a membrane when [Cl]i = 2mEq and [Cl]o=200

Answer 14

-123mV

Question 15

Sarcomere is composed of _______.

Answer 15

myofilaments

Question 16

Which of the following is composed entirely of myosin?

Answer 16

H band

Question 17

During contraction, when is the tension in a sarcomere greatest?

Answer 17

Actin filaments on opposite sides of the sarcomere fully overlap myosin heads without touch each other

Question 18

______contraction occurs when there is an increase in muscle tension but not length

Answer 18

Isometric

Question 19

What class of lever is demonstrated by raising the body on the ball of the foot

Answer 19

Second - class

Question 20

Ach is synthesized where?

Answer 20

Cytosol of the axon terminal

Question 21

Acetylcholinesterase is inhibited by ______?

Answer 21

Physostigmine

Question 22

According to what was discussed in class, what is an effective treatment of myasthenia gravis?

Answer 22

Neostigmine

Question 23

Soleus is primarily composed of ______

Gastrocnemius is mostly composed of ______

Answer 23

Dark, light

Question 24

What is the osmolarity of a 4mM solution of CaCl2

Answer 24

12 mOsm/L

Question 25

What characteristic does cardiac muscle have that skeletal muscles do not?

Answer 25

Branch, diads

Question 26

True/false Slow cardiac action potentials depolarize without any external signal

Answer 26

True

Question 27

What is the ejection fraction of someone who has EDV=125mL and an ESV = 50 mL?

Answer 27

60%

Question 28

What are the names of the AV valves in the order in which blood passes through them?

Answer 28

Tricuspid, mitral

Question 29

What are the purpose of the papillary muscles and chordae tendineae?

Answer 29

To prevent backflow from ventricle

Question 30

True/False

The greater the heart muscle is stretched during filling, the weaker the force of contraction during systole

Answer 30

False