Chapter 4-Muscle Tissue

Question 0

These myofilaments are active in muscular contractions, cellular movement and maintenance of cell shape. They are also lighter and thinner than their counterparts.

Answer 0

Actin myofilaments

Question 1

There are 2 types of myofilaments, what are they?

Answer 1

Actin Myofilaments and Myosin Myofilaments

Question 2

These myofilaments are darker and thicker than their counterpart, and are fibrous globulins that react to form actomyosin.

Answer 2

Myosin myofilaments

Question 3

These are repeating structural units of striated muscle fibrils.

Answer 3

Sarcomeres

Question 4

These are specialized nerve cells that deliver an impulse to a muscle cell, causing it to contract.

Answer 4

Motor neurons

Question 5

The junction between a motor neuron and a muscle fiber is called a ___________.

Answer 5

neuromuscular junction

Question 6

This neurotransmitter is contained in numerous presynaptic vesicles and transmit nerve impulses across a synapses.

Answer 6

Acetylcholine

Question 7

This enzyme found in nerve endings breaks down acetylcholine.

Answer 7

Acetylcholinesterase

Question 8

During periods of muscular exertion where ATP cannot be generated fast enough, ATP then starts being generated by?

Answer 8

Anaerobic glycolysis, and pyruvic acid is converted to lactic acid

Question 9

This is an iron-containing pigment found in red blood cells that carries 97% of the body’s oxygen.

Answer 9

Hemoglobin

Question 10

This muscle is striated and voluntary

Answer 10

Skeletal Muscles

Question 11

This muscle is non-striated and involuntary with a single nucleus

Answer 11

Smooth muscles

Question 12

This muscle is striated and involuntary, with 1 nucleus

Answer 12

Cardiac Muscle

Question 13

This smooth muscle is the more common of the 2 types, and are made of sheets of muscles that form layers. Example is the stomach, other digestive, reproductive and urinary tract organs.

Answer 13

Visceral Smooth Muscle

Question 14

This smooth muscle is found in the iris of the eye and the spleen, and are found in bundles of cells. Rate of contraction is slower than the other smooth muscle.

Answer 14

Multiunit Smooth Muscle

Question 15

In smooth muscle, these junctions interconnect the individual cells, and electrochemical signals travel quickly from one cell to others because of these conduction areas.

Answer 15

Gap Junctions

Question 16

Cardiac muscle has branching fibers between cells and protein-lined ion channels that allow action potentials to pass from cell to cell called _______.

Answer 16

intercalated disks

Question 17

Cardiac muscle, to an extent, is able to generate its own electrical activity. This is called?

Answer 17

Intrinsic Automaticity