This topic contains a solution. Click here to go to the answer

Author Question: What are the primary functions of the respiratory system? ... (Read 81 times)

hubes95

  • Hero Member
  • *****
  • Posts: 561
What are the primary functions of the respiratory system?

Question 2

The following steps occur in rods when they are excited by photons of light. What is the proper sequence for these steps? 1. Membrane sodium channels close. 2. Increased phosphodiesterase breaks down cGMP. 3. Retinal changes from the 11-cis form to the 11-trans form. 4. The membrane hyperpolarizes and the rate of neurotransmitter release declines. 5. Opsin activates transducin. 6. Opsin activation occurs.
 A) 1, 6, 5, 2, 4, 3
  B) 3, 6, 5, 2, 1, 4
  C) 6, 3, 5, 2, 1, 4
  D) 3, 6, 5, 1, 2, 4
  E) 1, 3, 4, 5, 6, 2



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Beatricemm

  • Sr. Member
  • ****
  • Posts: 323
Answer to Question 1

(1 ) Provide an extensive area for gas exchange between inhaled air and the circulation; (2 ) move air to and from the exchange surfaces of the lungs; (3 ) protect the respiratory surfaces from dehydration, temperature changes, and other environmental variations and defend the respiratory system and other tissues from invasion by pathogens; (4 ) produce sounds involved in speaking, singing, or nonverbal auditory communication; (5 ) direct incoming air to the olfactory epithelium in support of olfaction; (6 ) indirectly contribute to regulation of blood volume, blood pressure, and pH.

Answer to Question 2

B



hubes95

  • Hero Member
  • *****
  • Posts: 561

Beatricemm

  • Sr. Member
  • ****
  • Posts: 323
Always glad to help...



 

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Did you know?

Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

Did you know?

The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.

For a complete list of videos, visit our video library