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Chapter 16: Problem 15

In which of the following tissues would you expect to find smooth muscle? a. Arteries b. Stomach c. Urinary bladder d. Diaphragm e. Uterus f. The gums in your mouth

Short Answer

Expert verified
Smooth muscles are present in the Arteries, Stomach, Urinary bladder, and Uterus, but not in the Diaphragm or the gums.

Step by step solution

01

Identify the presence of smooth muscle in Arteries

Arteries do contain smooth muscle. In fact, smooth muscle makes up the middle layer of the arteries, allowing them to contract and dilate to regulate blood pressure and flow.
02

Analyze presence of smooth muscle in Stomach

The stomach also contains smooth muscle which allows for the contraction and relaxation required in peristalsis - the process of moving food through the digestive tract.
03

Consider smooth muscle in Urinary bladder

Smooth muscle is present in the urinary bladder as well. Its function here is to contract to expel urine when urinating, and relax to allow the bladder to fill when not urinating.
04

Determine if smooth muscle is found in the Diaphragm

The diaphragm does not contain smooth muscle, as it is a skeletal muscle which is under voluntary control, unlike smooth muscle.
05

Examine presence of smooth muscle in Uterus

The uterus contains smooth muscle. This muscle, also known as the myometrium, contracts during childbirth to help push the offspring out.
06

Inspect if smooth muscles are positioned in the gums

The gums do not contain smooth muscle. The gums mainly consist of dense fibrous tissue, but not smooth muscle.

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Most popular questions from this chapter

Use the equations of Chapter 9 to determine the free energy difference represented by a \(\mathrm{Ca}^{2+}\) gradient across the sarcoplasmic reticulum membrane if the luminal (inside) concentration of \(\mathrm{Ca}^{2+}\) is \(1 \mathrm{m} M\) and the concentration of \(\mathrm{Ca}^{2+}\) in the solution bathing the muscle fibers is \(1 \mu M\).

When an action potential (nerve impulse) arrives at a muscle membrane (sarcolemma), in what order do the following events occur? a. Release of \(\mathrm{Ca}^{2+}\) ions from the sarcoplasmic reticulum b. Hydrolysis of ATP, with release of energy c. Detachment of myosin from actin d. Sliding of myosin along actin filament e. Opening of switch 1 and switch 2 on myosin head

Duchenne muscular dystrophy is a sex-linked recessive disorder associated with severe deterioration of muscle tissue. The gene for the disease: a. is inherited by males from their mothers. b. should be more common in females than in males. c. both a and b. d. neither a nor b.

Rigor is a muscle condition in which muscle fibers, depleted of ATP and phosphocreatine, develop a state of extreme rigidity and cannot be easily extended. (In death, this state is called rigor mortis, the rigor of death.) From what you have learned about muscle contraction, explain the state of rigor in molecular terms.

When athletes overexert themselves on hot days, they often suffer immobility from painful muscle cramps. Which of the following is a reasonable hypothesis to explain such cramps? a. Muscle cells do not have enough ATP for normal muscle relaxation. b. Excessive sweating has affected the salt balance within the muscles. c. Prolonged contractions have temporarily interrupted blood flow to parts of the muscle. d. All of the above.
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