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

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

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.

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

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 chemical signal to electrical signal

Electrical signal to mechanical signal to electrical signal

Chemical signal to mechanical signal to electrical signal

None

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

Hemophilia

Anemia

Thrombosis

Artritis

None

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

To act as an insulator and speed up impulse transmission.

To provide structural support to the cell body.

To synthesize neurotransmitters for the neuron.

To receive chemical signals from other neurons

None

Which of the following is NOT part of the appendicular skeleton?

Clavicle

Vertebral Column

Humerus

Pelvic Girdle

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 chemically broken down by enzymes present in the dialysis fluid.

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

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

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?

Loop of Henle

Proximal convoluted tubule

Collecting duct

Glomerulus

None

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

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

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

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

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

None

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.

The diffusion of water down its concentration gradient

Active transport of waste products into the nephron.

Osmotic pressure created by proteins in Bowman’s capsule.

None

10.

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 prominent odontoid process.

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

It articulates with the skull and lacks a centrum.

It has a long, downward-pointing spinous process.

None

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