Humans have acquired an immune system that produces antibodies to neutralize pathogens. Still innate immune system is present at the time of birth because it:
1.
is very specific and uses different macrophages
2.
produces memory cells for mounting a fast secondary response
3.
has natural killer cells that can phagocytose and destroy microbes
4.
provides passive immunity
Which of the following statements is not correct?
| 1. | An action potential in an axon does not move backward because the segment behind is in a refractory phase. |
| 2. | Depolarization of hair cells of cochlea results in the opening of the mechanically gated Potassium- ion channels. |
| 3. | Rods are very sensitive and contribute to daylight vision. |
| 4. | In the knee-jerk reflex, stimulus is the stretching of muscle and response is its contraction. |
Match the following joints with the bones involved:
| Column-I | Column-II | ||
| (a) | Gliding joint | (i) | Between carpal and metacarpal of thumb |
| (b) | Hinge joint | (ii) | Between Atlas and Axis |
| (c) | Pivot joint | (iii) | Between the Carpals |
| (d) | Saddle joint | (iv) | Between Humerus and Ulna |
Select the correct option from the following:
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (iv) | (ii) | (i) |
| 2. | (iv) | (i) | (ii) | (iii) |
| 3. | (iv) | (ii) | (iii) | (i) |
| 4. | (i) | (iii) | (ii) | (iv) |
Which of the following diseases is an auto-immune disorder?
1. Myasthenia gravis
2. Arthritis
3. Osteoporosis
4. Gout
Artificial light, extended work-time and reduced sleep-time disrupt the activity of:
1. Thymus gland
2. Pineal gland
3. Adrenal gland
4. Posterior pituitary gland
Which of the following conditions will stimulate parathyroid gland to release parathyroid hormone?
1. Fall in active Vitamin D levels
2. Fall in blood Ca+2 levels
3. Fall in bone Ca+2 levels
4. Rise in blood Ca+2 levels
Which of the following is a correct statement?
1. IUDs once inserted need not be replaced.
2. IUDs are generally inserted by the user herself.
3. IUDs increase phagocytosis of sperms in the uterus.
4. IUDs suppress gametogenesis.
Which of the following sexually transmitted diseases do not specifically affect reproductive organs?
1. Genital warts and Hepatitis-B
2. Syphilis and Genital herpes
3. AIDS and Hepatitis B
4. Chlamydiosis and AIDS
Match the following genera with their respective phylum :
| Column I | Column II | ||
| (a) | Ophiura | (i) | Mollusca |
| (b) | Physalia | (ii) | Platyhelminthes |
| (c) | Pinctada | (iii) | Echinodermata |
| (d) | Planaria | (iv) | Coelenterata |
Select the correct option :
| Options: | (a) | (b) | (c) | (d) |
| 1. | iv | i | iii | ii |
| 2. | iii | iv | i | ii |
| 3. | i | iii | iv | ii |
| 4. | iii | iv | ii | i |
Which of the following animals are true coelomates with bilateral symmetry ?
1. Adult Echinoderms
2. Aschelminthes
3. Platyhelminthes
4. Annelids
© 2024 GoodEd Technologies Pvt. Ltd.