plane is at right angles to both an 45. The planes the A. Sagittal; midsagittal;

Question

plane is at right angles to both an 45. The planes the A. Sagittal; midsagittal; coronal B. Transvers; coronal; sagittal C. Coronal; sagittal; transverse D. Medial; coronal ;transvers E. Transvers; sagittal; coronal 46. Homeostasis: A B. C. D. E. is a dynamic process usually employing negative feedback is a static process that is independent of feedback control mechanisms is a dynamic process usually employing positive feedback refers only to those mechanisms designed to prevent hemorrhaging is physiological disequilibrium 47. A major avenue by which molecules can cross a plasma membrane is by: I Il Ill a carrier-mediated transport system diffusion through the lipid regions movement through membrane pores A. I only B. Il only C. Ill only D. 1 and Il only E. 1, 11, and III 48. Identify the specific type of exocrine gland based on the following information. Form: branched and rounded Location : mammary glands Function: produce and secrete milk A. Simple coiled tubular B. Simple branched tubular C. Compound tubular D. Compound alveolar E. Compound tubuloaveolar

Explanation / Answer

45. Option B. The Transverse plane is at right angles to both the coronal and sagittal planes.

Explanation: Transverse plane divides the body into superior and inferior portions and hence also called as Cross sectional or Horizontal plane. Coronal plane also called as frontal plane divides the body into anterior and posterior portions which is at right angles to the transverse plane. Sagittal planes is a vertical plane that divides the body or an organ into right and left sides. So this is also at right angles to the transverse plane

46. Option A. Homeostasis is a dynamic process usually employing negative feedback

Homeostasis is the condition in which there is maintainence of equilibrium in the body's internal environment by constant interaction of body's regulatory process. It is a dynamic process (not static hence, optionB is wrong) and operate usually by negative feedback mechanism.

For example Operation of Homeostasis by negative feedback mechanism as seen in regulation of Blood pressure, pH changes of blood etc

47. Option B. A major avenue by which molecules can cross a plasma membrane is by: II. diffusion through lipid regions

Explanation: Passive diffusion is also called as Non ionic diffusion. It is regarded as the important process for absorption of more than 90% of the drugs. Passive diffusion is expressed by Fick's first law of diffusion which states that drug molecules diffuse from a region of higher concentration to one of lower concentration until equilibrium is attained and that the rate of diffusion is directly proportional to the concentration gradient across the membrane.

Characteristics of Passive diffusion: . The drug moves down the concentration gradient indicating downhill transport.

2. The process is energy independent and non saturable

3. Greater the area and lesser the thickness of the membrane, faster the diffusion

4. The process is rapid over short distances and slower over long distances

5. The rate of transfer of unionised species is 3-4 times the rate of ionised drugs

6. Greater the partition coefficient of the drug, faster the absorption.

7. The process is dependent on molecular size of the drug. Drugs with molecular weight between 100-400 daltons are effectively absorbed.

48. Option E. Compound Tubuloalveolar

Explanation: Each lobe in mammary gland is highly branched (compound) and hollow (tubular), the secretory units of the glands consists of ducts and alveoli (alveolar). Thus can be classified as Compound Tubuloalveolar type of exocrine gland

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.