Kuiz Sains Tambahan Tingkatan 5 Bab 1 Set 1

SELAMAT DATANG Kuiz Sains Tambahan Tingkatan 5 Bab 1 Set 1

Penyenggaraan Dan Kesinambungan Hidup (English)

KUIZ INI MENGANDUNGI 10 SOALAN

What is the main driving force behind the process of ultrafiltration in the glomerulus?

Active transport of waste products into the nephron.

The diffusion of water down its concentration gradient

Osmotic pressure created by proteins in Bowman’s capsule.

High hydrostatic pressure due to the differing diameters of afferent and efferent arterioles.

None

During hemodialysis, how are waste products like urea removed from the patient's blood?

They are filtered out using a high-pressure system similar to the glomerulus.

They are chemically broken down by enzymes present in the dialysis fluid.

They diffuse from the blood into the dialysis fluid down a concentration gradient.

They are actively transported out of the blood by the dialysis machine.

None

In the mechanism of blood clotting, what is the immediate role of thrombokinase?

It directly forms a plug at the site of the wound.

It causes platelets to break down and release their contents

It converts fibrinogen into a mesh of fibrin.

It converts prothrombin into thrombin in the presence of calcium ions.

None

The transmission of a nerve impulse across a synapse involves the conversion of signals. What is the correct sequence of this conversion?

Chemical signal to electrical signal to chemical signal

Electrical signal to mechanical signal to electrical signal

Electrical signal to chemical signal to electrical signal

Chemical signal to mechanical signal to electrical signal

None

What is the unique feature of the first cervical vertebra, known as the atlas, that allows for the nodding motion of the head?

It articulates with the skull and lacks a centrum.

It has a long, downward-pointing spinous process.

It has a large, thick centrum to support the skull.

It has a prominent odontoid process.

None

The human skeleton is divided into two main parts. Which of the following bones belongs to the axial skeleton?

Sternum

Femur

Scapula

Radius

None

Which of the following best describes the cause of Alzheimer's disease as mentioned in the source material?

A genetic disorder affecting the myelin sheath, leading to muscle weakness

A progressive disorder caused by a lack of the neurotransmitter dopamine.

Shrinkage of brain tissue and reduced secretion of the neurotransmitter acetylcholine.

The formation of blood clots in the brain, leading to memory loss.

None

Which of the following correctly describes a symptom and cause of osteoporosis?

Symptom: Porous, brittle bones; Cause: Lack of calcium and Vitamin D.

Symptom: Inability of blood to clot; Cause: Lack of clotting factors.

Symptom: Joint inflammation; Cause: Uric acid crystal buildup.

Symptom: Progressive muscle weakening; Cause: A mutant gene on the X chromosome.

None

What is the primary function of the myelin sheath that surrounds some axons?

To provide structural support to the cell body.

To act as an insulator and speed up impulse transmission.

To synthesize neurotransmitters for the neuron.

To receive chemical signals from other neurons

None

10.

The functional unit of the kidney responsible for forming urine is the nephron. Which part of the nephron is primarily responsible for the selective reabsorption of glucose and amino acids?

Proximal convoluted tubule

Collecting duct

Loop of Henle

Glomerulus

None

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