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3a Resistance exercises cause an increase in cellular mitochondria, myoglobin, and capillary networks.true b.

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3a


Resistance exercises cause an increase in cellular mitochondria, myoglobin, and capillary networks.

a.       true

b.      false


Thin and thick filaments are organized into functional nits called ________.

a.       myofibrils

b.      myofilaments

c.       myosins

d.      T-tubules

e.       sarcomeres


Muscles typically work in pairs to move bones. These pairs are ____________ each other.

a.      antagonistic to

b.     cooperative with

c.      perpendicular to

d.     parallel to

e.      none of the above


Anabolic steroids can help to increase muscle mass, but they also

a.      are banned by governing bodies in sports.

b.     are illegal for nonmedical purposes.

c.      raise ethical issues of cheating.

d.     lead to significant, nonreversible medical problems, and in some cases fatal.

e.      all of the above.


Smooth muscle contraction is due to a series of neurotransmitter-filled bulges called varicosities that releases neurotransmitters into the synaptic cleft.

a.       true

b.      false


Dead cardiac muscle tissue is replaced by

a.       scar tissue

b.      connective tissue and adipose tissue

c.       Satellite stem cells

d.      myoblasts


The moveable end of the muscle that attaches to the bone being pulled is called the muscle's _______.

a.       origin

b.      brachioradialis

c.       brachii

d.      fixator

e.       insertion


Long-distance runners develop this type of skeletal muscle fibers.

a.       Type 1

b.      Type 2A

c.       Type 2B

d.      Red/Fast Oxidative fiber

e.       No answer


The movement of molecules from an area of high concentration to an area of low concentration is called _____ and carrier proteins are involved in a process called ________.

a.       active transport; active diffusion.

b.      facilitated inhibition; facilitated diffusion.

c.       Phagocytosis; simple diffusion.

d.      Pinocytosis; phagocytosis.

e.       simple diffusion; facilitated diffusion.


The movement of molecules against a concentration gradient is called ____ and uses energy directly from ____.

a.       active transport; ATP.

b.      facilitated diffusion; building of water molecules.

c.       osmosis; DNA

d.      phagocytosis; digestion by lysosomes

e.       simple diffusion; lipids


Osmosis is a process most similar to ______ and involves the movement of _____.

a.       active transport; . proteins.

b.      diffusion; water..

c.       endocytosis; carbohydrates.

d.      exocytosis; lipids.

e.       none of above.


In _______ solution, water leaves the cell since the extracellular fluid has a higher concentration of solutes than the fluid inside the cell.

a.       an isotonic

b.      a hypertonic

c.       a hypotonic

d.      a tonic

e.       a platonic


The secretion of materials, such as hormones and neurotransmitters, from inside of a cell to the outside is.

a.       exocytosis

b.      osmosis

c.       active transport

d.      endocytosis

e.       facilitated diffusion


What is the role of cholesterol in the membrane?

a.    transport materials across the membrane

b.   help maintain fluidity

c.    cellular identification

d.   adhesion

e.    none of these


The plasma membrane is

a.       completely permeable.

b.      found only in eukaryotic cells.

c.       found only in prokaryotic cells.

d.      impermeable.

e.       selectively permeable.


Parietal cells secrete ________.and _______ is involved in the chemical digestion of protein.

a.       Gastrin; pancreatic amylase

b.      hydrochloric acid; trypsin

c.       pepsin; sucrase

d.      pepsinogen; pancreatic nuclease

e.       bicarbonate; insuline


The main site of absorption is the

a.       esophagus.

b.      large intestine.

c.       oral cavity.

d.      small intestine.

e.       stomach.


Where are most fat-digesting enzymes produced?

a.       small intestine

b.      gallbladder

c.       liver

d.      pancreas

e.       large intestine


In the human digestive system, starch is broken down into ______.

a.       amino acids.

b.      fatty acids.

c.       glucose.

d.      glycerol.

e.       nucleotides.


The action of the gastroesophageal sphincter

a.       absorbs food across the wall of the esophagus.

b.      makes transport molecules.

c.       prevents food from moving into the esophagus.

d.      secretes enzymes.

e.       stores food in the esophagus.

Top Answer

1. False - 2. Sarcomeres 3. Antagonistic- 4. All of the above. 5. True. The varicosities contain neurotransmitters. 6. Dead... View the full answer

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