Identify the INCORRECT statement about the human lungs: MCQ with Answer and Explanation

Identify the INCORRECT statement about the human lungs:
A. The left lung has two lobes.
B. The pleura covers the lungs.
C. The right lung has three lobes.
D. The diaphragm is a smooth muscle.
Answer: Option D
Solution (By JKExamLibrary)
The diaphragm is a skeletal muscle, not smooth muscle. All other statements are correct.

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Practice More Biology Questions

Question #1
In which part of the human body is the pituitary gland located?
A. Neck
B. Pelvis
C. Brain (hypothalamus region)
D. Abdomen

Correct Answer: Option C


Explanation:
The pituitary gland is a pea-sized endocrine gland located at the base of the brain, in a bony cavity called sella turcica, attached to the hypothalamus by a stalk (infundibulum). It is divided into anterior and posterior pituitary, secreting hormones that regulate growth, reproduction, metabolism, and other endocrine glands. Thus, it's in the head, not neck or abdomen.

This question belongs to: Science Biology
Question #2
The technique of growing plants under controlled conditions in a sterile medium is:
A. Genetic engineering
B. Tissue culture
C. Cloning
D. Hydroponics

Correct Answer: Option B


Explanation:
Tissue culture involves growing plant cells, tissues, or organs on a nutrient medium under aseptic conditions to produce clones or disease-free plants.

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Question #3
Consider statements about human physiology: 1. The stomach secretes acid for digestion. 2. The small intestine is the main site of absorption. 3. The liver produces bile. Which are correct?
A. 2 and 3 only
B. 1 and 3 only
C. 1 and 2 only
D. 1, 2 and 3

Correct Answer: Option D


Explanation:
The stomach's gastric glands secrete hydrochloric acid (HCl), which creates an acidic environment necessary for the activation of pepsin and the initial digestion of proteins. The small intestine, with its vast surface area provided by villi and microvilli, is the primary site for the final digestion and absorption of most nutrients into the bloodstream. The liver is a large, multifunctional organ that continuously produces bile, which is stored in the gall bladder and released into the small intestine to emulsify fats. All statements are correct.

This question belongs to: Science Biology