'Around'

Question 1

What are the three types of muscle?

Answer 1

Smooth: non striated
one nucleus
found in organs
involutary
Cardiac: striated
one nucleus
Heart
involutary
Skeletal: Striated and tubular
multiple nucleuses
attached to bones by tendons.
voluntary

Question 2

What is Sliding Filament Theory?

Answer 2

When actin and myosin bond to contract muscles.
Troponin and tropomyosin prevent actin and myosin from bonding they wrap around actin.
Actin thin
Myosin thick

Question 3

What is the sarcomere?

Answer 3

Functional unit of the skeletal muscle

Question 4

What is the sarcolemma and the sarcoplasmic reticulum?

Answer 4

Where Ca+ is stored this is what causes troponin and tropomyosin to release.

Question 5

What are the steps of muscle contraction?

Answer 5

1. the brain signals the release of Ca+ from sarcoplasmic reticulum blocking troponin and tropomyosin.
2. Myosin attaches to the cross bridge bonding to actin
3. Myosin flexes and pushes actin closer to the M line
4. ATP releases myosin from cross bridge relaxing the muscle.

Question 6

What is paralysis?

Answer 6

When actin and myosin fail to bind resulting in limp body.

Question 7

What is rigor mortis?

Answer 7

Condition after death when muscles contract but don’t have an ATP to release.

Question 8

What does myogenic mean?

Answer 8

Means to act without connection to the nervous system.

Question 9

What does a beat of the heart consist of?

Answer 9

P: Sinoatrial Node initiates the heartbeat
located at the top right of the right atrium
Causes atria to contract draining the blood into the ventricle.
Q: Atrioventricular Node receives the signal
RS: Bundle of His close the valves and the purkinje fibres contract the ventricles

Question 10

What does the heart cycle look like?

Answer 10

Diastole is heart contraction
Systole is heart relaxation

Question 11

What is an aneurysm?

Answer 11

bulge in wall of blood vessels.

Question 12

What is angioplasty

Answer 12

Angio meaning blood vessel and plasty meaning surgery
An angioplasty is a surgery which increases the diameter of an artery because of a build up of plaque.

Question 13

What is a stroke?

Answer 13

When an aneurysm bursts.

Question 14

What is a heart attack?

Answer 14

blockage of coronary arteries stopping oxygenated blood from reaching the cardiac muscles.

Question 15

What is heart rate?

Answer 15

Heart rate is beat/min.

Question 16

What is stroke volume?

Answer 16

blood volume/beat

Question 17

What is cardiac output?

Answer 17

heart rate x stroke volume

Question 18

What is blood pressure?

Answer 18

The pressure exerted by the blood onto the vessel walls

Question 19

Where is blood pressure the highest? The lowest?

Answer 19

Near the heart in the aorta
lowest in the veins.

Question 20

What is hypertension

Answer 20

Chronic high blood pressure via the narrowing of arteries because of atherosclerosis or the hardening of cholesterol

Question 21

What are capillary nets?

Answer 21

Site of exchange

Question 22

What is osmotic pressure?

Answer 22

water pressure
water from tissues into blood

Question 23

What is the relationship between blood pressure and capillary nets?

Answer 23

Blood pressure pushes nutrients and vitamins into tissues.
Proteins and RBC are too big to leave.

Question 24

What is the function of the lymphatic system?

Answer 24

excess fluids that leak from capillaries
collects fats in digestion.

Question 25

What are lymph nodes?

Answer 25

storage of lymphocytes and trap bacteria

Question 26

What is lymph?

Answer 26

Fluid in lymph system

Question 27

What is extracellular fluid?

Answer 27

fluid around cells

Question 28

What is a hemorrhage?

Answer 28

Bleeding