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Flashcards in Physiology 1 Deck (98)
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1

Salatory conduction is described as conduction or an action potential through which type of fiber?
A. Myelinated nerve
B. Unmyelinated nerve
C. Cardiac muscle
D. Smooth muscle

A. Myelinated nerve

2

The greatest increase in peripheral vascular restriction in response to wide spread sympathetic stimulation is going to effect which tissue?
A. Nepatic
B. Cardiac
C. Cutaneous
D. Pulmonary

C. Cutaneous

3

Glomerulus consist primarily of ? that contain relative ? pressure compared to similar vessels in the bobd?
A. Capillaries/high
B. Capillaries/low
C. Arterioles/high
D. Arterioles/low

A. Capillaries/high

4

Relative refractory period is influenced by which of the following conditions?
A. increase Na
B. increase K
C. decrease Na
D. decrease K

B. increase K

5

During which of the following stages is the most prolactin secreated?
A. Soon after implantation
B. After delivery
C. Post partum
D. Before implantation

B. After delivery

6

Which of the following organells of skeletal muscle transmitts the action potential from outside of the cell to the inside of the cell?
A. Myofibril
B. Sacroplasmic reticulum
C. T-tubule
D. Cross bridges

C. T-tubule

7

The resting membrane potential of a neural membrane is said to be?
A. Neutral
B. Polar
C. Depolarized
D. Hyperpolarizied

B. Polar

8

In order to absorb Vit. B-12 which of the following is required?
A. Bile salts
B. Micells
C. Intrinsic factor
D. Pepsin

C. Intrinsic factor

9

Which of the following is a rapidly adapting receptor?
A. Golgi tendon apparatus
B. Thermoreceptor
C. Ruffini coruscle
D. Pacinian corpuscle
E. Golgi tendon apparatus

D. Pacinian corpuscle

10

What maintains basic body temep. Wht the entire body is chilled?
A. Skin vasoconstriction
B. Sweating
C. Chemical thermogensis
D. Shivering

D. Shivering

11

Which of the following is the stimulus to activate the flexor/withdraw response?
A. Pain
B. Cold
C. Pressure
D. Touch

A. Pain

12

Stimulation of which of the following tracts causes involuntary contraction of an excitatory extensor?
A. Reticulospinal
B. Rubrospinal
C. Corticospinal
D. Vestibulospinal

D. Vestibulospinal

13

Which of the following structures is not involved in the light reflex?
A. Pretectal
B. Edinger westphal nucleus
C. Cillary ganglion
D. Lateral geniculate

D. Lateral geniculate

14

Which of the following is a characteristic of smooth muscle?
A. Chodroitin
B. Fibers are arranged in sarcomere
C. Actin
D. Muscle spindles

C. Actin

15

Influx of what ion is responsible for depolarization?
A. Potassium
B. Sodium
C. Magnesium
D. Magnesium

B. Sodium

16

The greatest % of CO2 is transported as?
A. Dissolved CO2
B. Carboxylhemoglobin
C. Carbaminohemoglobin
D. Bicarbonate ion

D. Bicarbonate ion-> 70%

17

Which area of the brain coordinates voluntary eye movement?
A. Frontal
B. Temporal
C. Occipital
D. Parietal

A. Frontal-> (motor) pre motor cortex

18

From which of the following structures is LH derived?
A. Leydig cells
B. Anterior pituitary
C. Posterior pituitary
D. Hypothalamus

B. Anterior pituitary

19

The pancreas secretes which of the following substances?
A. Amylose
B. Gastrin
C. Somatostatin
D. Somatomedin

C. Somatostatin-> From delta cells of the pancreas-> Balancing hormone for GH.

NOTE: alpha cells of pancreas-> glucagon. Beta cells of pancreas-> insulin

20

During the resting phase of a neuron what is secreted?
A. Na. K. pump
B. Na. Out
C. K. out
D. Ca. In

B. Na. Out

21

Which of the following will lengthen the time for blood clotting?
A. decrease Vit. K
B. increase arterial pressure
C. increase venous pressure
D. decrease capillary pressure

A. decrease Vit. K

22

The stomach secretes which of the following substances?
A. Lipase
B. Gastrin
C. Cholecystokinin
D. Secretin

B. Gastrin-> 2 functions 1) Activates prital cells to produce HCL. 2) Activates Chief cells.

23

Which of the following is responsible for the formation of the corpus luteum?
A. LH
B. Estrogen
C. Progesterone
D. FSH

A. LH

24

When you come in contact with a cold object heat is lost by which of the following means?
A. Convection
B. Conduction
C. Evaporation
D. Radiation

B. Conduction

25

When body temperature is decreased by air currents what type of heat loss is this?
A. Convection
B. Conduction
C. Evaporation
D. Radiation

A. Convection-> air currents

26

Which of the following is most apt to produce the lowest renal filtration faction for glucose?
A. Hypoglycemia
B. Hyperglycemia
C. Glucosuria
D. Galactosemia

A. Hypoglycemia

27

Which the following is present in both cascade pathways?
A. C-1
B. C-2
C. C-3
D. C-4

C. C-3-> links alternate and classical

28

Systemic circulation differs from pulmonic circulation in that it has a ? Pressure and a ? resistance to flow?
A. Lower/lower
B. Lower/higher
C. Higher/lower
D. Higher/higher

D. Higher/higher

29

Which of the following conditions is most likely to cause edema?
A. Decrease arterial pressure
B. Increase plasma
C. Increase venous pressure
D. Increase lymphatic pumping from skeletal muscle action

C. Increase venous pressure

30

Which of the following is increased in fast muscle fibers?
A. Concentration of glycolytic enzymes
B. Concentration of Mitochondria
C. Concentration of myoglobin
D. Intercellular K concentration

A. Concentration of glycolytic enzymes