Author Question: Following ejaculation in a healthy adult, approximately 300 million sperm is present. Which percent ... (Read 81 times)

arivle123

  • Hero Member
  • *****
  • Posts: 569
Following ejaculation in a healthy adult, approximately 300 million sperm is present. Which percent of these sperm would be considered normal (mobile and morphologically healthy) and able to fertilize an egg?
 
  A)
  95
  B)
  75
  C)
  55
  D)
  45

Question 2

During pathophysiology class, a nursing student asks the faculty what purpose do the osteoprogenitor cells serve. From the following list, identify the purpose of these cells. Select all that apply.
 
  A)
  Formation of red blood cells
  B)
  Growth and remodeling of bone
  C)
  Anchorage point for blood vessels
  D)
  Repair of bone
  E)
  Supply nerves to the bone matrix



jesse.fleming

  • Sr. Member
  • ****
  • Posts: 301
Answer to Question 1

Ans:
C

Feedback:

Approximately 3 mL of semen is expressed with each ejaculate, and each milliliter is made up of about 100 million sperm. However, approximately 20 of the sperm in any ejaculate are not morphologically normal and about 25 are immobile.

Answer to Question 2

Ans:
B, D

Feedback:

The endosteum is the membrane that lines the spaces of spongy bone, the marrow cavities, and the haversian canals of compact bone. It is composed mainly of osteoprogenitor cells that contribute to the growth and remodeling of bone and are necessary for bone repair. The osteons consist of concentric lamellae of the bone matrix, surrounding a central canal, called the Haversian canal that contains blood vessels and supply nerves to the bone matrix. The periosteum acts as an anchorage point for blood vessels to enter and leave the bone. RBC formation occurs in the shaft of long bones.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

For a complete list of videos, visit our video library