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

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

It has a prominent odontoid process.

It articulates with the skull and lacks a centrum.

It has a long, downward-pointing spinous process.

None

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

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

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

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

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

None

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

To synthesize neurotransmitters for the neuron.

To receive chemical signals from other neurons

To provide structural support to the cell body.

To act as an insulator and speed up impulse transmission.

None

Which condition is characterized by the formation of a blood clot inside a blood vessel, obstructing the flow of blood?

Artritis

Thrombosis

Hemophilia

Anemia

None

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

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

It converts fibrinogen into a mesh of fibrin.

It causes platelets to break down and release their contents

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

None

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?

Collecting duct

Glomerulus

Loop of Henle

Proximal convoluted tubule

None

Which type of neuron is responsible for transmitting nerve impulses from the central nervous system to an effector like a muscle or gland?

Sensory neuron

Efferent neuron

Interneuron

Afferent neuron

None

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

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

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

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

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

None

What is the role of neurotransmitters such as acetylcholine and GABA?

To create a physical bridge for the impulse to cross the synapse.

To carry the chemical signal across the synapse to the next neuron.

To form the myelin sheath around the axon.

To provide energy for the transmission of nerve impulses.

None

10.

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

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

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.

None

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